Japan's central bank raised interest rates to a three-decade high, but the move was seen as less convincing, causing the yen to weaken sharply overnight. The U.S. intervened alongside Japan to strengthen the currency due to potential knock-on effects. American markets appear to be taking it in stride, with stocks set for another gain and bond yields stable.

In other news, Warren Buffett will step down as chairman of Berkshire Hathaway, marking the end of an era. Follow live markets data and coverage for real-time updates.